Re: After brexit
I am afraid metrication was a complete stuff up in the UK.
In Australia they changed over here when I first arrived and I, like many, whinged and whinged about being made to go metric and having to learn something new.
The law was changed banning the production and import of rulers with imperial measurement on them, all temperatures and measurements referred to on the media HAD to be in metric only. (Police notices of suspect's height being the only exception) and all the road signs were changed over night, new cars had only kph on the speedo.
Now I am so glad they did it that way and forced us Luddites to use metric; no more Fahrenheit, miles, pints, gallons, pounds and ounces and all those absurd and incompatible measures. Metric is so much better. I have one ruler left with inches on one side, what a bloody nuisance that is; you can only use one side to measure anything so it has to be constantly turned round.
I must admit that occasionally I might say to my kids something like, "Help me move this a few inches toward me". Big mistake - the object could move a centimetre or a metre, they have absolutely no concept of archaic imperial measurements.
You would be better off making Brexit a clean break and stopping anything being referred to in imperial measurements and changing to metric properly at long last (for gods sake I was in the 4th or 5th form at Grammar school when it started).
Stop being a case study of the worst possible way to go metric.